One face of a rectangular glass slab is silvered

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One face of a rectangular glass plate 6 cm thick is silvered. An object held 8 cm in front of the first face, forms an image 12 cm behind the silvered face. The refractive index of the glass is(a) 0.4(b) 0.8(c) 1.2(d) 1.6

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1w2 1exa root square


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